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E. W. BURGESS.

CUTTING APPARATUS FOR MOWING MACHINES.

APPLICATION FILED JULY 5,1916.

1,308,1 62. Patented July 1, 1919.

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UNITED sra'rns PATENT nnwnnn wnnnenss, on-onreneo, IIlLinoIsnssjrenoi-t, Y nssreivmnn'rs, To

INTERNATIONAL HARVESTER ooarrmvr,

OFFICE.

A CORPORATION OF NEW JERSEY.

cur'rrns arrnnarus ron riovvinG-MAonnvns.

To all whom it may concern: j

Be it known that I, EDWARD W. BURGESS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Cutting Apparatus for Mowing-Machines, of which the following is a full, clear, and exact specification.

My invention relates to cutting apparatus for mowers, and in particular toan improved construction of the knife head; its object being to provide a knifehead formed from softsteel that will be both light and strong and cheaply made.

This object is attained by means ofthe construction illustrated in the accompanying drawing, in which Figure 1 is a front elevation of a sheet steel blank having an angular cross section and spaced semtspherical bosses upon its vertical web;

Fig. 2 is a top plan view of the blank after it has been given a curved form;

Fig. 3 is a top view of the complete head,

and

Fig. 4 is a cross section of Fig. direction of the arrows.

The same reference characters designate like parts throughout the several views.

The blank is first formedwith horizontally and vertically disposed Webs 5 and 6, respectively, the horizontal Web having a 2 in the widened angular portion? extending from one end of a shank 8 and forming a head portion that is separated from a narrower flanged portion 9 bya gap 10, and llrepresents alined openings in the shank 8 where by the head may be secured to a knife back (not shown). The blank is then given the form shown in Fig. 2, with semi-spherical bosses 1:2 struck from the head portion or the vertical web upon opposite sides of the gap 10. The vertical web is then turned at the gap 10 in adirection to fold it together,

bringing the narrower flanged portion 9 in rear of the angular P01131011 7 and the sem1- spherical bosses 12 in allned positlon to form a ball bearing for a pitman connection, as shown 1n Fig. 3. j i

The nnproved structure 1s light and Specification of Letters Patent.

1 strong,

en'ibodiment of my ing provided with ing. on the same side in operation.

Having shown and described a preferred invention, I do not desire that it be confined to the specific details ofthe structure as illustrated, it being understood that changes may be made in the form, proportion and organization of its parts without dep. rting from the spirit of my invention the appended claims.

i What I claim as my invention, and desire to secure by Letters Patent, is:

1. A knife head having horizontally and vertically disposed web members, the vertical portion comprising two sections and bealined separately formed outwardly projecting bosses having semis-pheri'cal bearing surfaces on their outer faces.

2. A knife head having horizontally and vertically disposedweb members, said vertical web comprising two parallel members havin alined outwardl )ro ectin bosses a .1 m

havin semi-s hericial bearing, surfaces on their outer faces.

.3. A knife head having horizontally and vertically disposed web members, said verti: cal web comprislng two parallel integrally connected contacting members, said members having alined outwardly projecting semi-spherical bosses.

4. ,A blank from which a knife head may be formed, having a vertical web and a plurality of separated horizontal webs extendof said VGItlCtLl web,

Patented July 1, 1919. Application filed July 5,1916. Serial No. 10?,677. a

cheaply made, durable and efiicient as indicated by the scope of and semi-spherical bosses projecting outwardly from bosses being zontal webs.

said vertical web one of said 5. A. blank from which a knife head may be formed including horizontally and vertically disposed web members, said. horizontal Web having a widened end portion and provi ded with an ends and: extending toward said vertical web, and semi-spherical bosses projecting outwardly from the face of said vertical web upon opposite sides of said gap.

6. A knife head having horizontally and disposed over each ofsaid hori' open gap intermediate its vertically disposed Web members said vertical Web being doubled upon itself at one end and provided With alined semi-spherical bosses forming a ball bearing fora pitman 5 connection.

'7. A knife head having horizontally and vertleally disposed Web members, said verfive cents each, by addressing the Commissioner of Patents,

Copies of this patent may be obtained for Washington, D. O. 

